(a) Draw an L.S. of pistil showing pollen tube entering into the embryo sac. Label the following :
(i) Nucellus (ii) Antipodals
(iii) Synergids (iv) Micropyle
(b) Write the functions of the following :
(i) Synergids (ii) Micropyle

Explanation

(b) (i) Synergids : Synergids have special cellular thickenings at the micropylar tip called filiform apparatus which plays an important role in guiding the pollen tube into the synergid.
(b) Micropyle : It helps pollen tube to enter the ovule and then enters one of the synergids through the filiform apparatus.